test: Fix lambda smoke test flicker.

[nrcventura]

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Description

The lambda smoke tests will sometimes fail when the lambda method runs long enough to trigger a transaction trace when the test doesn't expect a transaction trace to be generated. In this PR we are flipping the logic around to ensure that a transaction trace is generated, and verify that it is included in the payload.

Author Checklist

• Unit tests, Integration tests, and Unbounded tests completed
• Performance testing completed with satisfactory results (if required)

Reviewer Checklist

• Perform code review
• Pull request was adequately tested (new/existing tests, performance tests)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.55%. Comparing base (0be7ccd) to head (8e8de40).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2521      +/-   ##
==========================================
- Coverage   80.55%   80.55%   -0.01%     
==========================================
  Files         459      459              
  Lines       28759    28759              
  Branches     3152     3152              
==========================================
- Hits        23168    23166       -2     
- Misses       4812     4813       +1     
- Partials      779      780       +1     

Flag	Coverage Δ
Agent	81.49% <ø> (-0.01%)	⬇️
Profiler	72.15% <ø> (ø)

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see 1 file with indirect coverage changes